/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.portal.servlet.filters.cache;
import com.liferay.portal.kernel.exception.NoSuchLayoutException;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.language.LanguageUtil;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.model.Group;
import com.liferay.portal.kernel.model.Layout;
import com.liferay.portal.kernel.model.LayoutTypePortlet;
import com.liferay.portal.kernel.security.auth.AuthTokenUtil;
import com.liferay.portal.kernel.service.GroupLocalServiceUtil;
import com.liferay.portal.kernel.service.LayoutLocalServiceUtil;
import com.liferay.portal.kernel.servlet.BrowserSnifferUtil;
import com.liferay.portal.kernel.servlet.BufferCacheServletResponse;
import com.liferay.portal.kernel.servlet.HttpHeaders;
import com.liferay.portal.kernel.struts.LastPath;
import com.liferay.portal.kernel.util.CharPool;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.JavaConstants;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.PortalUtil;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portal.servlet.filters.BasePortalFilter;
import com.liferay.portal.util.PortalInstances;
import com.liferay.portal.util.PropsValues;
import com.liferay.util.servlet.filters.CacheResponseData;
import com.liferay.util.servlet.filters.CacheResponseUtil;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* @author Alexander Chow
* @author Javier de Ros
* @author Raymond Augé
*/
public class CacheFilter extends BasePortalFilter {
public static final String SKIP_FILTER = CacheFilter.class + "SKIP_FILTER";
@Override
public void init(FilterConfig filterConfig) {
super.init(filterConfig);
_pattern = GetterUtil.getInteger(
filterConfig.getInitParameter("pattern"));
if ((_pattern != _PATTERN_FRIENDLY) && (_pattern != _PATTERN_LAYOUT) &&
(_pattern != _PATTERN_RESOURCE)) {
_log.error("Cache pattern is invalid");
}
}
@Override
public boolean isFilterEnabled(
HttpServletRequest request, HttpServletResponse response) {
if (isCacheableRequest(request) && !isInclude(request) &&
!isAlreadyFiltered(request)) {
return true;
}
else {
return false;
}
}
protected String getCacheKey(HttpServletRequest request) {
StringBundler sb = new StringBundler(9);
// Url
sb.append(request.getRequestURL());
String queryString = request.getQueryString();
if (queryString == null) {
queryString = (String)request.getAttribute(
JavaConstants.JAVAX_SERVLET_FORWARD_QUERY_STRING);
if (queryString == null) {
String url = PortalUtil.getCurrentCompleteURL(request);
int pos = url.indexOf(CharPool.QUESTION);
if (pos > -1) {
queryString = url.substring(pos + 1);
}
}
}
if (queryString != null) {
sb.append(StringPool.QUESTION);
sb.append(queryString);
}
// Language
sb.append(StringPool.POUND);
String languageId = (String)request.getAttribute(
WebKeys.I18N_LANGUAGE_ID);
if (Validator.isNull(languageId)) {
languageId = LanguageUtil.getLanguageId(request);
}
sb.append(languageId);
// User agent
String userAgent = GetterUtil.getString(
request.getHeader(HttpHeaders.USER_AGENT));
sb.append(StringPool.POUND);
sb.append(StringUtil.toLowerCase(userAgent).hashCode());
// Gzip compression
sb.append(StringPool.POUND);
sb.append(BrowserSnifferUtil.acceptsGzip(request));
return StringUtil.toUpperCase(sb.toString().trim());
}
protected long getPlid(
long companyId, String pathInfo, String servletPath, long defaultPlid) {
if (_pattern == _PATTERN_LAYOUT) {
return defaultPlid;
}
if (Validator.isNull(pathInfo) ||
!pathInfo.startsWith(StringPool.SLASH)) {
return 0;
}
// Group friendly URL
String friendlyURL = null;
int pos = pathInfo.indexOf(CharPool.SLASH, 1);
if (pos != -1) {
friendlyURL = pathInfo.substring(0, pos);
}
else if (pathInfo.length() > 1) {
friendlyURL = pathInfo;
}
if (Validator.isNull(friendlyURL)) {
return 0;
}
long groupId = 0;
boolean privateLayout = false;
try {
Group group = GroupLocalServiceUtil.getFriendlyURLGroup(
companyId, friendlyURL);
groupId = group.getGroupId();
if (servletPath.startsWith(
PropsValues.
LAYOUT_FRIENDLY_URL_PRIVATE_GROUP_SERVLET_MAPPING) ||
servletPath.startsWith(
PropsValues.
LAYOUT_FRIENDLY_URL_PRIVATE_USER_SERVLET_MAPPING)) {
privateLayout = true;
}
else if (servletPath.startsWith(
PropsValues.
LAYOUT_FRIENDLY_URL_PUBLIC_SERVLET_MAPPING)) {
privateLayout = false;
}
}
catch (NoSuchLayoutException nsle) {
if (_log.isWarnEnabled()) {
_log.warn(nsle);
}
}
catch (Exception e) {
if (_log.isWarnEnabled()) {
_log.warn(e);
}
return 0;
}
// Layout friendly URL
friendlyURL = null;
if ((pos != -1) && ((pos + 1) != pathInfo.length())) {
friendlyURL = pathInfo.substring(pos);
}
if (Validator.isNull(friendlyURL)) {
try {
long plid = LayoutLocalServiceUtil.getDefaultPlid(
groupId, privateLayout);
return plid;
}
catch (Exception e) {
_log.warn(e);
return 0;
}
}
else if (friendlyURL.endsWith(StringPool.FORWARD_SLASH)) {
friendlyURL = friendlyURL.substring(0, friendlyURL.length() - 1);
}
// If there is no layout path take the first from the group or user
try {
Layout layout = LayoutLocalServiceUtil.getFriendlyURLLayout(
groupId, privateLayout, friendlyURL);
return layout.getPlid();
}
catch (NoSuchLayoutException nsle) {
_log.warn(nsle);
return 0;
}
catch (Exception e) {
_log.error(e);
return 0;
}
}
protected boolean isAlreadyFiltered(HttpServletRequest request) {
if (request.getAttribute(SKIP_FILTER) != null) {
return true;
}
else {
return false;
}
}
protected boolean isCacheableData(
long companyId, HttpServletRequest request) {
try {
if (_pattern == _PATTERN_RESOURCE) {
return true;
}
long plid = getPlid(
companyId, request.getPathInfo(), request.getServletPath(),
ParamUtil.getLong(request, "p_l_id"));
if (plid <= 0) {
return false;
}
Layout layout = LayoutLocalServiceUtil.getLayout(plid);
if (!layout.isTypePortlet()) {
return false;
}
LayoutTypePortlet layoutTypePortlet =
(LayoutTypePortlet)layout.getLayoutType();
return layoutTypePortlet.isCacheable();
}
catch (Exception e) {
return false;
}
}
protected boolean isCacheableRequest(HttpServletRequest request) {
String portletId = ParamUtil.getString(request, "p_p_id");
if (Validator.isNotNull(portletId)) {
return false;
}
if ((_pattern == _PATTERN_FRIENDLY) || (_pattern == _PATTERN_LAYOUT)) {
long userId = PortalUtil.getUserId(request);
String remoteUser = request.getRemoteUser();
if ((userId > 0) || Validator.isNotNull(remoteUser)) {
return false;
}
}
if (_pattern == _PATTERN_LAYOUT) {
String plid = ParamUtil.getString(request, "p_l_id");
if (Validator.isNull(plid)) {
return false;
}
}
return true;
}
protected boolean isCacheableResponse(
BufferCacheServletResponse bufferCacheServletResponse) {
if ((bufferCacheServletResponse.getStatus() ==
HttpServletResponse.SC_OK) &&
(bufferCacheServletResponse.getBufferSize() <
PropsValues.CACHE_CONTENT_THRESHOLD_SIZE)) {
return true;
}
else {
return false;
}
}
protected boolean isInclude(HttpServletRequest request) {
String uri = (String)request.getAttribute(
JavaConstants.JAVAX_SERVLET_INCLUDE_REQUEST_URI);
if (uri == null) {
return false;
}
else {
return true;
}
}
@Override
protected void processFilter(
HttpServletRequest request, HttpServletResponse response,
FilterChain filterChain)
throws Exception {
request.setAttribute(SKIP_FILTER, Boolean.TRUE);
String key = getCacheKey(request);
String pAuth = request.getParameter("p_auth");
if (Validator.isNotNull(pAuth)) {
try {
AuthTokenUtil.checkCSRFToken(
request, CacheFilter.class.getName());
}
catch (PortalException pe) {
if (_log.isDebugEnabled()) {
_log.debug(
"Request is not cacheable " + key +
", invalid token received",
pe);
}
processFilter(
CacheFilter.class.getName(), request, response,
filterChain);
return;
}
key = key.replace(StringUtil.toUpperCase(pAuth), "VALID");
}
long companyId = PortalInstances.getCompanyId(request);
CacheResponseData cacheResponseData = CacheUtil.getCacheResponseData(
companyId, key);
if ((cacheResponseData == null) || !cacheResponseData.isValid()) {
if (!_isValidCache(cacheResponseData) ||
!isCacheableData(companyId, request)) {
if (_log.isDebugEnabled()) {
_log.debug("Request is not cacheable " + key);
}
if (cacheResponseData == null) {
if (_log.isInfoEnabled()) {
_log.info("Caching request with invalid state " + key);
}
CacheUtil.putCacheResponseData(
companyId, key, new CacheResponseData());
}
processFilter(
CacheFilter.class.getName(), request, response,
filterChain);
return;
}
if (_log.isInfoEnabled()) {
_log.info("Caching request " + key);
}
BufferCacheServletResponse bufferCacheServletResponse =
new BufferCacheServletResponse(response);
processFilter(
CacheFilter.class.getName(), request,
bufferCacheServletResponse, filterChain);
cacheResponseData = new CacheResponseData(
bufferCacheServletResponse);
LastPath lastPath = (LastPath)request.getAttribute(
WebKeys.LAST_PATH);
if (lastPath != null) {
cacheResponseData.setAttribute(WebKeys.LAST_PATH, lastPath);
}
// Cache the result if and only if there is a result and the request
// is cacheable. We have to test the cacheability of a request twice
// because the user could have been authenticated after the initial
// test.
String cacheControl = GetterUtil.getString(
bufferCacheServletResponse.getHeader(
HttpHeaders.CACHE_CONTROL));
if (isCacheableResponse(bufferCacheServletResponse) &&
!cacheControl.contains(HttpHeaders.PRAGMA_NO_CACHE_VALUE) &&
isCacheableRequest(request)) {
CacheUtil.putCacheResponseData(
companyId, key, cacheResponseData);
}
}
else {
LastPath lastPath = (LastPath)cacheResponseData.getAttribute(
WebKeys.LAST_PATH);
if (lastPath != null) {
HttpSession session = request.getSession();
session.setAttribute(WebKeys.LAST_PATH, lastPath);
}
}
CacheResponseUtil.write(response, cacheResponseData);
}
private boolean _isValidCache(CacheResponseData cacheResponseData) {
if ((cacheResponseData != null) && !cacheResponseData.isValid()) {
return false;
}
return true;
}
private static final int _PATTERN_FRIENDLY = 0;
private static final int _PATTERN_LAYOUT = 1;
private static final int _PATTERN_RESOURCE = 2;
private static final Log _log = LogFactoryUtil.getLog(CacheFilter.class);
private int _pattern;
}